ATI Outdoors Advanced Technology LOP Quick Stop – AR-15/M4 Buttstock Adjustment Lock

The ATI Outdoors Advanced Technology LOP (Length of Pull) Quick Stop locks your collapsible AR-15 buttstock at your preferred position, eliminating unintended movement during transport or use. This simple upgrade prevents the common issue of adjustable stocks shifting forward or backward when bumped, ensuring consistent cheek weld and eye relief every time you shoulder your rifle.

Machined from durable polymer, the LOP Quick Stop installs in seconds without tools—simply slide it onto your carbine buffer tube between the receiver and buttstock at your desired position. No permanent modifications required. Works with mil-spec diameter buffer tubes and most commercial collapsible buttstocks including M4-style, Magpul MOE, and similar designs.

• Part Type: Buttstock Position Lock
• Compatible Firearms: AR-15, M4, and other rifles with mil-spec carbine buffer tubes
• Material: High-impact polymer
• Finish: Black
• Installation: Drop-in, no tools required
• Includes: (1) LOP Quick Stop